Alka-Seltzer Plus® Cold & Cough Liquid Gels See new warning. Acetaminophen/ pain reliever-fever reducer. Chlorpheniramine maleate/antihistamine. Dextromethorphan Hbr/cough suppressant. Phenylephrine HCl/nasal decongestant. Cough. Nasal congestion. Runny nose. Headache & body ache. Sinus pressure. Bayer.